1.20.1 1.20.1 modded, book is null error

[porcupaleric]

 

so i added some mods and i couldnt join the MP server anymore. when i try to join it says   "java.lang.nullpointerexception: cannot invoke "net.minecraft.resources.ResourceLocation.toString()" beacause "book" is null."

i tried fixing it on my own beforehand but i dont have the server log for that time. the error was surrounding the mod mysticalAgriculture and patchouli books or something along those lines, i removed the mod but still receive the error. 

help is appreciated

 

the server error log: https://mclo.gs/MfRlzDL

[TileEntity]

Maybe an issue with the mod skilltree